Gas burner



H. H. DODGE June 12, 1934.

GAS BURNER Filed NOV. 22, 1928 3 Sheets-Sheet 1 EFF-ii" ll lllll ,1 IIIH. H. DODGE June 12, 1934.

GAS BURNER Filed NOV. 22, 1928 5 Sheets-Sheet 2 June 12, 1934. H. H.DODGE GAS BURNER Filed NOV. 22. 1928 l 4 I": l lll 3 Sheets-Sheet 3Patented June 12, 1934 NITED STATES PATENT OFFIE GAS BURNER ApplicationNovember 22, 1928, Serial No. 321,156

4 Claims.

This invention relates to a gas burner which is particularly adapted foruse in heating house heating water or steam boilers or hot air iurnaces.

I will illustrate, for the sake of convenience, the invention as appliedto a water boiler such as used in household heating but the invention isnot confined to such use.

In the drawings;

Figure l is a sectional view of the burner showing the same in placewithin a household boiler, the latter also being shown in section;

Figure 2 is a plan View or the burner; and

Figure 3 is a side elevation of the same.

In the drawings, the boiler is illustrated. This boiler includes theusual water container having an inner wall 1 and an outer wa1l2 with thewater space 3, within which inner wall 1 the fire pot 4 is formed. Thisboiler is supported upon a base 5 in the usual way, which base forms theash pit 6, the front of which ash pit is normally open.

The device itself consists essentially of a plurality or burnersarranged within the fire pot to produce a flame adjacent the inner wallof the boiler, means for creating an air curtain on the side of theflame remote from the inner wall of the boiler, means for mixing the airand gas to form a combustible mixture for the burners, and means forconducting the mixture under pressure to the burners and air underpressure to the air curtain producing means.

The embodiment of the device which I have illustrated in the drawingsincludes a manifold, which is preferably made in the form of a casting.This manifold which is illustrated in the drawings and which is for thepurpose of supplying air and combustible mixture to four burners isprovided with two mixing chambers 7, which 40 are arranged above anotherpair 8 of mixing chambers.

In order that these two pairs of chambers may be supplied with gas a gassupply chamber 9 is formed which is of such an area that it rcommunicates with all four of the mixing chambers '7 and 8. This gassupply chamber receives the gas through a port which is connected with asuitable source of supply.

In order that the upper pair of mixing cham- -bers '1 may be suppliedwith air, the manifold is provided with an air supply chamber 10, whichis of such an area that it communicates with both of the chambers '7.This air supply .chamber receives its air from a suitable source of airunder pressure through a port 10, such,

for instance, as from a blower oi the character described in mycopending application Serial No. 319,214, filed November 14, 1928, whichblower I have here represented conventionally, and indicated by thereference character 11. The lower mixing chambers 8 are likewisesupplied with air from an air supply chamber 12, which is also connectedwith the same source or supply of pressure air. So that the air chambersl0 and 12 may be supplied with air under pressure from the same commonsource 11 through the common inlet 10, I have provided the ends of themanifolds with covers 12. These covers each have partitions 13' whichcreate chambers 14 and 15. The chamber l l communicates with the ends ofthe gas chamher 9- and the chamber 15 communicates with the ends of theair chamber 10 and the air chamber 12. Thus air under pressure enteringthe inlet 10 will pass, by means of the chamber 15 to both of thechambers 10 and 12 for distribution to the mixing chamber.

It is of course desirable in supplying air to the mixture chambers '7and 8 to regulate the quantity of air in relation to the quantity of gaswhich enters those chambers. For such regulation the passages betweenthe air supply chamber 10 and the mixing chambers 7, between the airsupply chamber 12 and the mixing chamber 8, are valve controlled. Thiscontrol may, therefore, be by an adjustable valve-that is, one which maybe manually adjusted or by a fixed valve, such as is shown in thedrawings at 13, these valves 13 being in the form of perforated platesheld in place by nuts 16' which plates may be supplanted by othersimilar plates having different port areas.

To supply gas from the chamber 9 to the mixing chambers 7 and 8,injectors are provided which injectors have centrally located passages16, the eiiective opening of each of which is controlled by a perforatedplate 17 in the end of the injector which, like the plates 13, may bechanged. These injectors discharge into Ven turi openings 18, from whichthe gaseous mixture is conducted.

Extending from the manifold and communicating with the Venturi openings18, which extend from the upper chambers '7 are burner supporting arms19 and from the Venturi openings, which communicate with the chambers 8,are arms 20. The arms 19 are provided with plates 21 on which theburners are adjustably supported, and each of these plates is providedwith a slot 22 which communicates with the bore 23 its of the arm, whichbore in turn communicates with the chamber 7 through the Venturi opening18. Thus the slot 22 in the plate 21 is supplied with a combustiblemixture under pressure.

Each of these plates 21 is also provided with a slot 24 which slot issupplied with air under pressure in the following manner:

A pipe 25 communicates with this slot 24 and extends to a port 26 in themanifold, which port communicates with the air supply chamber 10 and isvalve controlled at 27. Thus the air which passes to the slot 24 throughthe pipe 25 is taken from the air supply at a point in advance of themixing chambers 7, so that the measured quantity of air entering themixing chambers is not affected by the flow of air from the supplychamber 10 to the pipe 25.

For the other pair of burners a similar arrangement is providedthat isto say, each of the supports 20 has a plate 28 at the end thereof and aduct 29 communicating with the adjacent Venturi opening 18 and hencewith the mixing chamber 8. duct 29 likewise communicates with a slot inthe plate 28 corresponding with the slot 22 in the plate 21. An airsupply pipe 30 communicates with a slot in the plate 28 correspondingwith the slot 2 1 in the plate 21, and this air supply pipe communicateswith the air supply chamber 12 through a valve controlled port 31,similar to the port 26 which I have described, but through a by-pass S2.

The burner head of the form shown in the drawings which is particularlyadapted for use with the plates 21 is similar to that described in mycopending application, Serial No. 321,155 filed November 22, 1928, butit is to be understood that such a burner head, as described in mycopending application Serial No. 321,154 filed November 22, 1928 may beused, in which event, of course, the form of the supports 19 and 20 andof the air supply pipes 25 and 30 will be changed to that shown in saidlast mentioned application. However, this will necessitate no change inthe manifold.

Describing the burner head which is illustrated in these drawings, andtaking only one of these for the purpose of description, it includes acasting which is adjustable on the plate 21 and held in its adjustedposition by a bolt 33. The slot 22 in this head communicates with thecombustible mixture chamber 3 1, irrespective of the adjusted positionof the burner on the plate 21, and this chamber 34 which is tortuous andhas a bafiie, such as described in one of the above referred toapplications, communicates with a burner tip 36 having a slot 37 thereinfor the escape of the combustible mixture to a burning position. Theburner is also provided with an air chamber 38 which commimicates with aslot 24 in the plate 21, irrespective of the position of the burner.This chamber 38 discharges the air adjacent the burner tip 36 andbetween the tip and a bafile 39, which directs the air toward the flameabove the tip 36.

As the other burners are of substantially the same construction I neednot describe the construction of each.

As this device is adapted for use in standard household boilers by mereinsertion in the fire pot and ash pit, it is of course desirable to havethe burners adjustable as I have described them, so that they may beadapted to various inside diameters of boilers and so that the positionof the burners may be adjusted in relation to the inner wall of theboiler.

Moreover, should it be desirable, as the size of the boiler increasesthe number of burners may likewise be increased and this, of course,will necessitate an increase in the number of supporting arms and airsupply pipes which extend from the manifold.

Another feature of my invention which is of importance is the provisionof means for supporting the device Within the ash pit and theconstruction of this means in such manner that it may be used by mereadjustment to support the device within boilers of different types. Thismeans includes a plurality of adjustable standards 49 adjacent the endsof the arms 20 and adjustable supporting standards 50 beneath themanifold.

What I claim is:

1. In a manifold, a plurality of mixing chambers, a gas supply chambercommon to all of said mixing chambers, air supply chambers, each commonto only certain of said mixing chambers, ducts for the escape of thegaseous mixture from the mixing chambers, and a duct for the escape ofair from each of said air supply chambers directly to the atmosphere.

2. In a manifold, a plurality of mixing chambers, a gas supply chambercommon to all of said mixing chambers, air supply chambers, each commonto only certain of said mixing chambers, ducts for the escape of thegaseous mixture from the mixing chambers, a duct for the escape of airfrom each of said air supply chambers directly to the atmosphere, andmeans for supplying air under pressure to said air supply chambers.

3. The combination with a burner for combustible mixture and an airpassage associated therewith, of a supply manifold for said burner,

said manifold having a plurality of mixing chambers, a gas supplychamber common to all of said mixing chambers, air supply chambers eachcommon to only certain of said mixing chambers, a duct extending fromthe mixing chambers to the burner, and a duct extending from each of theair chambers to the air passage.

4. The combination with a burner for combustible mixture and an airpassage associated therewith, of a supply manifold for said burner, saidmanifold having a plurality of mixing chambers, a gas supply chambercommon to all of said mixing chambers, air supply chambers each commonto only certain of said mixing chambers, a duct extending from themixing chambers to the burner, air ducts extending from each of the airchambers to the air passage, and means for supplying air under pressureto said air chambers.

HARRY I-I. DODGE.

